Sometimes(very often!) we need to add effects on our voice recording. To make it sound better, to make it sound thicker, or just to maker it sound incredible!
For widening/thickening, or making choir like voices, you can use : chorus, voice multiplier, voice doubler, stereo wideners.
/vst-plugin-sawer.html. For radical changes or special FX, you can use harmonizer / pitch changing, genre changer, pitch correction / autotune.

1. Free Pitch Shifter Vst
2. Vst Pitch Changing Plugins
3. Pitch Formant Vst

The Pitchwheel plug-in freely alters the pitch and timbre of a sound in real-time. It has a large, easy to use dials and simple parameters making it a fast and creative effect unit. It can give fine tuning control from fractions of a semi-tone to huge multi-octave pitch swings. While it's the best vocal VST plugin out there, not everyone can spend $400+ on just 1 tool. That's why I present you MAutoPitch, one of the best Auto-tune alternatives around. It lets you correct sour notes, fix pitch, and even add the iconic T-Pain effect (just max the tuning and the speed).

Antares Auto-Tune 8. The eighth full version of perhaps the most famous plugin of all time.

Here’s a top 5 of free VST effects for changing the voice :

Free Pitch Shifter Vst

1) Azurite multi voice chorus VST

This great chorus can work on many type of sources : guitar, voice, etc.
It works nicely for voice, it’s not too hard/harsh and does a good job on mono inputs for spreading voices and give a stereo effect.

information & download @ http://distorqueaudio.com/plugins/azurite.html

Dry voice :
https://blog.wavosaur.com/wp-content/uploads/2014/03/Katherine-Ellis-dry.mp3

Voice with chorus!
https://blog.wavosaur.com/wp-content/uploads/2014/03/Katherine-Ellis-chorus.mp3 Reverse delay vst plugin free.

2) ADT – Artificial Double Tracking

This VST has no GUI

When you can’t record two takes for doubling your voice, you can gor for the artificial double tracking technic! The Beatles did it, and now you can too.
Voice doubling ahs never been so easy.

Download here : http://www.vacuumsound.de/plugins.html

3) Emonizer Micro Pitch Shifter effect

Emonizer VST

This free VST effect is intended for thickening, it’s a “one trick pony”, it’s in fact a micro pitch shifter, that add detuned voices, it creates a wider sound. Works also for other sounds than voice!

download it now ! => http://music.service-1.de/html/wok_emonizer_vst_micro_pitch.html

4) g200kg KeroVee & roVee

Here we go now for a more radical effect !
With this one you can change the nature/type/genre of the voice, make it from female to male, or from female to male. KeroVee is a pitch correction plugin, it can also do the “autotune” effect.

Information and free download @ http://www.g200kg.com/en/software/kerovee.html

Normal dry voice
https://blog.wavosaur.com/wp-content/uploads/2014/03/ultra-nate-normal.mp3

Maxi chorused multiplied choir-i-fied voice !
https://blog.wavosaur.com/wp-content/uploads/2014/03/Ultra-Nate-multiplied.mp3

female voice
https://blog.wavosaur.com/wp-content/uploads/2014/03/simone-normal.mp3

from female to male ! genre changing
https://blog.wavosaur.com/wp-content/uploads/2014/03/simone-female-to-male.mp3

Maxi super chorus : voice multiplier !
https://blog.wavosaur.com/wp-content/uploads/2014/03/Simone-voice-multiplier.mp3

5) ag-works chorus ch-2

Chorus CH-2 VST

Vst Pitch Changing Plugins

Here, at Wavosaur, we love the monstachorus VST by Betabugs, but i thought the Chorus CH-2 is lesser known, and deserve some exposure. It’s like having 4 independant chorus you can tweak in parallel.

Pitch Formant Vst

download for free @ http://ag-works.net/plugins.ch2.htm